package com.hgt.springcloud.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @Author: huanggaotao
 * @Description:
 * @Date: Created in 14:53 2021/6/28
 * @Modified By:
 */

//做了一个全局过滤器
@Component
@Slf4j
public class MyLogGateWayFilter implements GlobalFilter, Ordered {

    //过滤内容很简单  就是判断请求带不带uname这个key，并且uname对应的值不能为null
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("*******************************进入全局过滤器");
        String uname = exchange.getRequest().getQueryParams().getFirst("uname");
        if (uname == null) {
            log.info("*************************用户名为null，非法用户，");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();
        }
        return chain.filter(exchange);
    }


    //加载过滤器的顺序，值越小优先级越高
    @Override
    public int getOrder() {
        return 0;
    }
}
